Know your weaknesses.

Penelope Trunk, a career coach and author of Brazen Careerist: The New Rules for Success, wrote in a blog
post on the topic: “If you don’t know your weakness, take a personality
type quiz and the results will show you. Everyone has specific
strengths and everyone has specific weaknesses. It’s pretty certain that
if you are not clear on your weaknesses then you are not clear on your
strengths, and your value at the office will be questionable.”